Alloy



I 5 Massachusetts, haveinvented certain new and A alloy orcom pound metal which shall be praeti- 1 0 eally non-magnetic, inoxidizable, and'willhave 2o eight-1(8) parts.

' UNITED STAT- s PATENT] OFEI DANIEL OHARA, DANIEL W. nnnnnnen, AND JOHN LOGAN, or WALTHAM, j MAssAoHUsE'qrs. I

ALLOY,

SPECIFICATION forming part ofLetters Patent no. 385,953, dated July 1 1888. Application filed March 2. 1888. Serial No. 265.933, (fie specimens.) I

' po'rtions'df'plati'iiiirn, copper, and goldehovefi specified, but may vary the same within reason-able limitswithout departing from the spirit of-onr'invention. '25 We claim'- Y f useful Improvements in Alloys, of which the An alloy or compound metal composed of following is a specification. platinum,copper, nickel,and gold, in substan- Ourinventionhas forits object to provide an tia'lly the following parts, viz: sixtyparts of platinum, twenty-two parts of copper, from 30 five to forty parts of nickel, and eightparts of gold. I

- In testimony whereof we have signetloun names to this specification, in the presenceof two subscribing witnesses, ruary,v A. D. 1888.

\ DANIEL OHARA..-

ITANXEL W. ELDREDG-E. I JOHN LOGAN.

To all when it may concern.- Be itknown that we, DANIEL O HARA, DAN- IEL W. ELDBEDGE, and J OHN LOGAN, of Wintharn, in the cohnty of Middlesex and State of a suitable coeificien't of expansion to adapt it for use as the material for one of the parts of the rim of a compensation-balance for watches or chrbnometers.

Onrimproved alloy consists of a compound of platinum,.copper, nickel, and gold in about the following proportions: platimim, sixty (60) parts; copper; twenty-two (22) parts; nickel,from five (5) to forty (40) parts; gold,

Witness-es:

Ve do not limit ourselves to the ezactprothis 2 8th day of Feb- 5- 

